LECTURE 23: Musculoskeletal Disease II

Question 1

What is rickets?

Answer 1

Softening of bones due to failure to mineralize osteoid = osteomalacia

Question 2

What are the things that cause pathogenesis with rickets?

Answer 2

1. Deficiency of calcium
2. Deficiency of vitamin D3
3. Deficiency of P
4. Malabsorption

Question 3

What are clinical signs of rickets?

Answer 3

1. Difficulty walking
2. Soft, rubbery beaks and bones
3. Palpable curved keel

Question 4

Rickets occur in why kinds of birds?

Answer 4

Young birds

Question 5

What are gross lesions of rickets?

Answer 5

Beading of ribs
Soft rubbery bones
Rib Fractures
Lateral deviation of sternum
Widened growth plates

Question 6

Rickets causes what abnormality?

Answer 6

Growth plate (beading at the ribs)

Question 7

What is Cage layer fatigue?

Answer 7

Osteoporosis - thin and brittle bones
Really common with caged layers

Question 8

What are clinical signs of cage layer fatigue?

Answer 8

Paralysis or fractures/deviation of spine that damages spinal cord
Fractures of the leg, wing bone, and soft shell eggs

Question 9

For rickets and cage layer fatigue what do you test?

Answer 9

1. Histopathology
2. Feed and water
3. Bone samples
4. Blood levels

Question 10

What is spondylolisthesis?

Answer 10

Kinky back posterior paresis/paralysis

Question 11

What is Tibial dyschondroplasia (TD)?

Answer 11

Cartilage plug in the growth plate

Question 12

Where is TD most common?

Answer 12

Growing meat-type birds

Question 13

What causes TD?

Answer 13

Genetic selection
Ca/P ratio
Metabolic acidosis
Incorrect acid base
**Does not generally cause lameness

Question 14

What is perosis?

Answer 14

Slipped tendons (tendons go out of place)